If a site is loaded over a HTTPS connection but loads a favicon resource over HTTP, the mixed content warning is not displayed to users. This vulnerability affects Firefox < 63.Referenceshttps://www.mozilla.org/security/advisories/mfsa2018-26/https://bugzilla.mozilla.org/show_bug.cgi?id=1484753http://www.securityfocus.com/bid/105721https://usn.ubuntu.com/3801-1/http://www.securitytracker.com/id/1041944
